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It may have had a sail on its back
Eurypterids primarily lived in brackish water in lagoons and estuaries
rays and skates of today
these fishes lived in the Tethys Ocean
they were quite diverse during the Palaeozoic Era
Thescelosaurus, claw Compsognathus It may have had aThescelosaurus (pronounced THES ke loh SAWR us) (meaning "Marvelous lizard") was a bipedal, plant eating dinosaur whose fossilized, four chambered heart was found, perhaps indicating that it was warm blooded. It dates from the late Cretaceous period, about 77 to 65 million years ago. It had a small head, a bulky body, a long, pointed tail and short arms. It was a thescelosaurid or hypsilophodontid, and an ornithischian dinosaur about 12 feet (3. 5 m)
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